1. Chair of Process Dynamics and Operation, Berlin Institute of Technology, Sekr. KWT-9, Strasse des 17. Juni 135, D-10623 Berlin, Germany
2. DFG Research Center MATHEON, Rudower Chaussee 25, D-12489 Berlin, Germany
3. ThyssenKrupp Uhde GmbH, Friedrich-Uhde-Strasse 15, D-44141 Dortmund, Germany